Question

From the elements 10A, 14B, 8°C and 18 D identity
28B, 6C and 18D identify:
(a) the most electro positive element.
(b) a noble gas.
(c) a metalloid.
(d) an element which will gain 2 electrons to attain nearest noble gas
configuration.
(e) formula of compound formed between A and C.
(f) elements belonging to same period.
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Answer 1

Answer:

a) 28B is most electropositive

b) noble gases are 10A and 18D

c) 14B is metalloid

d) 8C can gain 2 electrons to attain inert gas configuration

e) compound can not formed between A and C

f) 14B and 18D are in same period

Explanation:

10A = 1s²2s²2p6

14B = 1s²2s²2p6 3s²3p²

8C = 1s²2s²2p⁴

18D= 1s²2s²2p6 3s²3p6

28B= 1s²2s²2p6 3s²3p6 4s²4p6 5s²

6C= 1s²2s²2p²